Ford expedition not pulling when in drive unless you rev ...
Responses
Kenny Z.
210 days ago
Hello, my name is\*\*\*\*\* to JustAnswer and thanks for your question!
Sorry for any concerns you might be experiencing with your vehicle today. I understand it can be frustrating. Hopefully we can get them resolved to your satisfaction.
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Thanks for waiting. I hope you are doing well.
Is reverse working normally?
Customer
210 days ago
reverse works fine
Kenny Z.
210 days ago
Usually either the forward piston outer seal has failed or the forward cylinder has cracked. Both very common failures for the 4R70W. Both require internal repair or or replacement. I attached a few examples below. Sorry for the bad news. :(
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Kind Regards,
Kenny
Customer
210 days ago
could I just replace those components? Or would I need a complete rebuild?
Kenny Z.
210 days ago
If you're going to open it up and go that far might as well rebuild it you're 75% of the way there. I can't imagine tearing the trans that far down and not at least replacing all the friction surfaces and all internal seals.
All the hard parts can be reused if not worn too bad or otherwise damaged.
Customer
210 days ago
Alright thank you you've been very helpful.
Kenny Z.
210 days ago
You're very welcome!
Customer
210 days ago
After scouring the internet for days only things I found were replace valve body and bad torque converter...One last thing I forgot to mention is the only codes it pulled were related to lean fuel or something like that found a vacuum line that was damaged and the service engine light went off..
Kenny Z.
210 days ago
As long as it has good reverse it won't be the valve body or torque converter. This concern rarely sets any transmission codes.
Customer
210 days ago
Alright appreciate it I guess I'll pull the trans tomorrow and see what I can find.
Kenny Z.
210 days ago
Best of luck!
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Ford expedition not pulling when in drive unless you rev the [engine](/topics-engine-ford/) up to 3800ish rpms Mechanic's Assistant: How many miles are on the Ford? Is it an automatic or a manual [transmission](/topics-tra...
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